Grinding machine tool carriage control



Maf 6, w47 G. ERlKsoN ET AL 2,420,170

GRINDING MACHINE TOOL CARRIAGE CONTROL Filed Oct.' 2. 1942 6 Sheets-Sheet l @Wwfwfwsf May 6, 1947. G. ERlKsoN ETAL GRINDING MACHINE TOOL CARRIAGE ,CONTROL Filedct. l2. 1942 6 Sheets-Sheet 2 v i. fi No u N, n. v

M'ay 6, 1947. G. ERlKSQN ETAL 2,420,170

GRINDING MACHINE TOOL CARRIAGE CONTROL Filed oct. 2.' 1942 6 sheets-sheet s 52067270715 HSZZ EEK/Elson me @21576012 y May 6, 1947 G. ERlKsoN ETAL 2,420,170

GRINDING MACHINE TOOL CARRIAGE, CONTROL Filed Oct. 2. 1942 6 Sheets-Sheet 4 May 6 1947- G. r-:RlKsoN ET AL 2,420,170

GRINDINC! MACHINE TOOL CARRIAGE CONTROL Filed oct. 2. 1942 e sheets-sheet 5 May 6, 1947. G. ERlKsoN ET AL -GRNDING MACHINE TOOL'CARBIAGE CONTROL 6 Sheets-Sheet 6 Filed 001i. 2. 1942 Patented May 6, 1947 GRINDING MACHINE TOOL CARRIAGE CONTROL Gustaf Erikson, Benton Harbor, andEddie Christian Filstrup, St. Joseph, Mich., assignors to Covel Mfg. Co., BentonHarbor, Mich., a corporation of Michigan Application October 2, 1942, Serial No. 460,556

This invention relates to machine tools and 'more particularly to a universal grinder for cutters, tools and other machine or like parts.

A primary object of the invention is the provision of an improved grinding machine adapted for universal adjustment and simple operation to yeffect any desired grinding operation on any desired work material and providing for either rapid vor slow feeding movement of .a grinding wheel head transversely of a reciprocal work supporting table.

A further object is the provision of a grinding machine in which a grinding wheel head may be fed either rapidly for slowly towards and away :from a work table and the means for effecting slow feed is readily and simply detached from operable connection with the head to permit rapid feed of the head.

A further object is the provi-sion of new, improved and relatively simple means for effecting either rapid or slow feeding movement of a tool support.

A still further object is the provision of new and improved means for imparting slow feeding movement to a tool support and for rendering the slow feed means inoperative when it is desired to effect rapidmovement of the support and readily operative when it is desired to effect slow feeding movement.

Still another object is the provision of a slow speed feeding and adjusting mechanism for a tool support that is adapted to be rendered either operative or inoperative at any position along the path of feeding movement of the support.

A further object is the provision of a grinding machine in which a manually movable .saddle apparent throughout the progres-s of the following specification.

The accompanying drawings illustrate a selected embodiment of the invention and the views therein are as follows: i

Fig. 1 is a perspective view of a grinding ma.. chine constructed in accordance with the present invention;

Fig. 2 is a plan View of the complete machine; k Fig. 3 is a front elevation of a portion of the machine, the view being partly broken away and partly in section;

Fig. 4 is a fragmentary elevation of a portion of the machine at the right hand end and shows the lever for effecting rapid feed of the grinding wheel head;

Fig. 5 is a transverse vertical section taken on the line 5--5 of Fig, 2;

Fig. 6 is a horizontal section taken on the line 6-5 of Fig. 5; I

Fig. 7 is a sectional detail taken on the line l-llof Fig. 2; and Fig. 8 is a vertical section taken longitudinally of the machine on the line 8-8 of Fig. 2f

The particularmachine herein described for illustrating theV invention has a box-like frame I0 which is generally T-shaped'and comprises a longitudinally extending forward portion II and a rearwardly extending vportion I2. A stationary bed plate I3, having downwardly extending side flanges I4 and I5, Figs. l, 3, 5 and 8, is carried by the longitudinally extending portion II of thel frame and provides a support and guide fora reciprocal work table I6. The work table I6 is carrying a tool support is rapidly moved transversely of a work table by merely throwing a hand lever in one direction or another.

A further object is the provision of a grinding machine having a simple drive means for effecting rapid movement of a tool carrying saddle and having an independent screw feed for effecting slow adjusting movement of the saddle, both said rapid drive means and said screw feed .being conveniently operable from a plurality of diierent positions around the machine.

Another object is to provide an improved stop mechanism for limiting forward movement of a movable tool support, the stopl being readily adjusted along the path of saddle movement and being simply moved to a released or inoperative position.

Numerous other objects and advantages will be slidably attached to thebed Plate I3, as indicated at Il, and suitable roller or ball bearings I8 may be provided between the bed plate and work table to assist in reciprocal movement of the table. A work holder I9 ismounted on the top of the table I 6, asby means of the bolts 2U, and is reciprocal therewith.` The work holder I9 is adapted to carry suitable jigs or the like for supporting work material in any desired position on the work table. l Y

Reciprocal movement of the work table I6 on the bed plate I3 is effected by any desired means. One such means is illustrated in the drawings and comprises a hand wheel 2|, which is attached to a shaft 22 rotatably mounted on the side flange 'I4 of the bed kplate I3 at the right-hand end of the machine, and provides Afor operating Va train of gears designated generally by the reference numeral 23 in Fig. 3. The gear train 23 coacts withfa rack 24 carriedby the work table IB to move the work table and the holder I9 thereon in 29, mounted in suitable racespnthe saddleand frame, assist in the free sliding--rriovel'u'entofv the saddle. The saddle carries a grinding wheel 4 verticaI adjustment of the head is effected by either of a pair of hand Wheels 59 and B0 positioned at the front and back sides of the machine, respectively, and providing for vertically adjusting the head 3D from either the front or rear side of the machine. `'I-he hand wheels 59 "and S0 'areeach attached to a sleeve 6I which is rotatably supported within bearings 62 mounted upon the front and rear walls of the frame portions II and I2. A collar 63, which is at- -tached to eachfof the sleeves 6I by a set screw L or the like, provides for maintaining the sleeves head 30 having a shaft ,3| rotatably Vmounted therein. The shaft 3I is -adaptedfgtofcarrysuita'- able grinding wheels, suchtas the'whe'els'32 and" 33, for operating on the work material.

The head 30 is mounted .on the saddle 25 by a means provided for verticaladjustn'g movement of the head, and also permitting rotation-off the head about a verticalaxis. To this end a cylindrical and' vertically extending sleeve or bearing `)member 34 is attached" to or formedintegral with thetopplate -26 Qi the-saddle. A second cylinl c lrical member -or sleeve 135 isslidab ly mounted Within the member 34 and is provided with a iflangejSI at itsrupper end ,yAthird cylindrical menfiber or sleeve 3 7H is rotatably mounted Within vthe second sleeve 35, and is provided with a :f langeSB which overlies the flange 36 of the sec- Mondiales@ the' Mages-36, and providing a thrust bearing for rotatably supporting the third cylindrical member within the| second. The ,grinding -Wheel'heal A3l) vis bolted to theflange ...Saas ,indicated-.at as; andV ,is adapted to, be rotated within the sleeve and locked'in adjusted posi'tion'by any suitable means (not- ,shoWn).

4n electric motqr 40 provides for driving the shaft 3| of the grindingwheeljheady and is at- ;teyhed by4 .Suitablexsunprtg' ,means 4,' t0; the lower end of the cylindrical member-*31. The ,1 .n0torjv4ds operatively connected with a rshaft 42 by means of a belt 43 enga ging around fsteppedf cheese.;.Sneedfpulleys-44Y and 45.; YThe shaft 42 fi s rotatably mounted in a'collar 46 at- .rtachedto the -inner cylindrical `member 3'I and r foriz f`1i 1 igfa' lower .fthrustbearing for the member f 3,1,", El-ulleys,I' aridf48"are, attached tothe shafts -,.42 `fan`d`., 3l,` respectively, anda bjeltl trained L',a' round` these pulleys and'extendin'g upwardly ,"{tlirough the hollow interior-of the membe 31 lpovides for Arotating fthe grinding wheel Vshaft- 3 I operation oi'them'otor 4U.

4 Vertical adjustmentof the head 30-is effected gb'y; a n shaft '56 which extends transverselyof` the machine beneath the saddle 25 and carries a worm fr5I having fmeshingengagement with a againstaxial movement within the bearings 62. ','The shaft-501 is slidably but non-rotatably con- ;'nected with e'achof the sleeves 6I by means of a f=1keyf64 attachedto the sleeve 6I and operating within an elongated keyway 65 provided in each 'end 0f the 's'haftl The shaft 50 is thus free --to slide longitudinally of the sleeves 6I upon movement of the saddle 25 and head 3D, but is caused to rotate upon rotation of either of the wheels 'Siler- 60 -to eifectfvertical adjusting move.. ment of 'the'lhe'adf3' and thegrinding wheels carried thereby.

A-The saddle'25 andthe head 3B. carried thereby are adapted vto Ibe. given very- -rapid movement toward andaway'fomthe-work table |,6,rand are also adapted to begiven very slow movementfto elect vine v adjustment' c iflthergrinding wheels with respect Vto work-material. carried bythe table I6, The means for' ifecting rapid travel of the saddle comprisesfafchain-SS -which' extends transverselyfofjthe machine beneath the saddle 2 5 and Vris trained over-a pair of sprockets El and 68. Thes'procket 61 iis positionedadjacent they forward4 side of the machinev andv is attached to a 'longitudinally extendingI shaft- 69, nwhich is suitably'lmountedin bearings-10 and II attached-to the machinefframe, 'andprojects out- `wardly from fthe bearingil I Y. at the right hand idof the. frame portion `II., as indicated Y ati-'12, ".ligs. 3 and'. AThe Vsprocket 58 is attached to a stub shaftv'l3, Fig. 2, rotatably mountedin a plate 'HL Figs. 1 and 2,? bolted by bolts'lSlto-the left hand side ofthe rearwardly extending frame por- Q tion-"I2 The" bolts -I5`e'xtend 'through elongated v'slots `16 Aprovidedlin 4'the plate'lll, lwhereby the sprocket .68 maybe adjstedproperly to tension 'the' chain Y66. The saddlel 25 is. operatively vconnected `to the .chain 66 by means of a lug 11, Figs. 3; 16 'and 8, "which extends downwardly from the topf plate"26of the saddle and is connected to fone` of .the'liksof the upper reach of the'chain .andgwheelf are mounted within aY suitable housing 54 ,whiclfi isrigidly attached to the outer cylindri- 1 Qeimmbe 34,- aS'by-,a bracket 5'5, Fie. 6; and-the J'shaft 53is rotatab l y Ajournaled in the housing agit and` in a pair orbearings 56, also attached 4to fthe ylndiel. member 3.4, A pnionfSl istattached to the shaft`53 between the bearings ,56 and has mes l 1 ing engagement with' an elongated r a cl r 53 attached to the intermediate cylindrical 35, the outerkcylindricalmember 34 be- 'tablysrecessed t9 permit engagement-of the l pinionjwith the rack Thusmpon rotation oi the 'transverse shaft- 5 0, the pinion -and Irack 51-58 fi causesthe` cylindrical memberf l35 to "moveupf,wardly'zcrfdownwardlyfwithin lthe member V34 to f eiectLvertical Aadjusting movement of the inner fvislef'vefl' and the! head ,30 Lcarried thereby.

` ."Rotation of the transverse.shaft-7501mi-causeAv ES. Thus, uponmoveme'rit o'f the chain in either a Vforwarder backward 'direction by rotation of the"sprocketssranaea, the` saune 25 and head 30 are"caused.toin'ove' v:forwardly or rearwardly jataspeed corresponding with. the speed ofmove ment of the chain. "The chain is given rapid movement injeithery ajfor'ward or rearward'direc- 'tinby means'of ahand'lever T8, Figs. 1, 4 and V8,"which is adaptedto beid'etachably connected s eitherrto the Youtwardly projecting end'12 of the "js'haft '6 3 atthe right-hand end ofthe machine, or toi anoutwardly projecting'portionl!) ofthe stub 'fshaft 135 at the left end 'ofthe' machine. Rapid movement of the saddle f25-and head 30 can thus be effected fromfeither the right or left ends of thema'chine, depending upon `which is fthe-more Y convenient "for the particular.`grinding operation beingperformed. l

Referring tov` E'grl, the ileverf 'I8 is :illustrated asfcomprising ai crankzarmi and anv operating handle 8|. Any suitable means, such asasplit `lllat th'eei'nner` en df ofuthearmi 18D, and clamping bolts 83, may be provided for detachably connecting the lever 18V to either the shaft 69 or the shaft 13. 4A simple throw of the handle 8| either downwardly'or upwardly causes `the saddle 25 and the head 39 rapidly to move either forwardly or rearwardly.

The means for eiecting slow adjusting movement of the saddle 25 and head 30 transversely of the work table I6 comprises a pair of hand `wheels 80 and 85 which are positioned, respectively, at the forward and rear sides of the machine. These hand wheels, however, are selectively connectible and disconnectible with the saddle 25 either to feed the saddle forwardly or `rearwardly at a slow speed when connected thereto, or to permit rapid movement of the sad- `dle under operation of lever-18 when disconnected.

Referring more particularly to Figs. 1 and 6, a hollow sleeve 86 is rotatably mounted 'in a plate 81 attached to a forwardly extending flange 88 on the side wall I4 of the bed plate I3. The hand wheel 84 is pinned or otherwise attached to the sleeve 89, and the sleeve 88, while free to rotate in a bearing 89 in the plate 81, is maintained against axial movement by thrust bearings 90 and 9| positioned between the hand wheel 80, the plate 81, and a pinion 92 also attached to the sleeve 86. An outer sleeve 93 is slidably but non-rotatably mounted on the sleeve 88, a key 94, attached to the outer sleeve 93 and operating in a keyway 95 on the inner sleeve 80, providing for sliding movement of the outer sleeve while maintaining the outer sleeve against rotation with respect, to the inner sleeve 88.

The outer sleeve 93 is provided with an external screw-threaded portion 98 which has threaded engagement with an internally threaded nut 91. The nut 91 is xedly attached to the saddle 25 vby means of a strap or yoke-like member 98, which is rigidly attached to the saddle 25 and extends downwardly therefrom. The nut 91 is bolted to the strap or yoke-like member 9B, as indicated at S9, and is thus maintained against rotation with respect to both the inner and outer sleeves 86 ,andV 93. A take-up nut |00, having threaded engagement with the nut 91 and the sleeve 93, may also be provided to take up backlash.

The sleeves 88 and 93 are adapted to be locked together or unlocked selectively to permit either slow or rapid movement of the saddle 25 `and head 30 by means of a rod |0| which extends through the hollow bore of the inner sleeve 88 and is rotatably but non-slidably mounted therein by means of a collar |02 and a thrust bearing |03. The rod |01 extends outwardly of the hand wheel 84 and has an operating knob |04 pinned or otherwise attached thereto. The inner end of rod is provided with a screw-threaded portion |05 which has threaded engagement with an internally threaded, tapered wedgng member |09. The inner end of the sleeve 88 is suitably notched and cut away to provide a plurality of resilient, outwardly tapered fingers |01. The construction is such that upon turning the knob |00 in one direction, the wedge member |06 moves inwardly to wedge and lock the fingers |01 and the inner sleeve 86 to the outer sleeve 93, whereas turning the knob |04 in the opposite direction unlocks the sleeves 8B and 193.

Thus whenlthe sleeves 86 and -93 are unlocked, the outer sleeve 93 is free to slide on the inner sleeve 89, and rapid movement of the saddle 25ans head so may be effected by lever 1s. 'ro .effetdine adjustment of the head 30,1the knob |04 is turned to lock the sleeves 80 and 93 against relative axial movement. Thereafter; the hand wheel 84 maybe turned in either'direction and effects rotation of the outer sleeve 93 by means of key `94 and keyway 95. Since the outer` sleeve 93 is now locked against axial movement with respect to the inner sleeve 86, the nut 91 is caused to move along the length of the screw `thread '96 and carries the saddle 25 and head 30 with it. ,After a particular grinding operation has been completed', the' knob |04 may be turned to unlock the sleeves 86 and 93 and permit rapid movement oi' the saddle and head under operation of the lever 10.

To permit slow feeding operation of the saddle 25 and head 30 from the hand wheel 85 at the rear end of the machine, a shaft |08 extends transversely of the machine and has a pinion |09 attached thereto. The pinion |09 is adapted to have meshing engagement with the pinion I92 and provides for rotating the sleeve 86 upon rotation of the shaft |08. The shaft |08 is provided with a forwardly extending end ||0 of reduced cross-section, which is rotatably mounted in a bearing carried by a cap ||2 positioned within the plate member 81. The opposite end of the shaft |08 is journaled within a bearing H3 attached to a strap H4, Figs. 5 and 7, depending downwardly from the plate member 26 of the saddle 25. f

The bearing member ||3 is of ka construction generally similar to the bearing member 62 and comprises a sleeve I5 which is rotatably mounted within the bearing member ||3 by suitable bearing means and to which the hand wheel is xedly attached. A collar H6, which may be attached to the sleeve ||5 by a set screw o r the like, provides for maintaining the sleeve ||5 against axial movement within the bearing H3. The rear end of the shaft |08 is slidably but non-rotatably mounted within the sleeve ||5 by means of a key ||1 attached to the sleeve ||5 and operating within an elongated keyway ||8 provided in the shaft |08. The shaft y|08 is thus adapted to be turned by operation of the Vhand wheel 85 but is free to slide within the sleeve ||5 upon rearward and forward movement of the saddle 25. 1

A means is provided, however, for disconnecting the shaft |08 and the hand wheel 85 when itis desired to operate the slow speed feed mechanism from only the forward side of the machine. To

this end, the forwardly extending end I|0 of the shaft |08 is provided with an internal bore within which a spring H9 is compressed by the cap member ||2. A circular member |20 is rotatably mounted on the machine and carries a pin |2| adapted to engage against the gear |09. A handle |22 is attached to the rotatable member |20 andprovides for rotating the member |20 to compress the spring ||9 and move the gear |09 out of engagement with the gear 92. Upon movement of the handle |22 in theopposite direction, the gears |09 and `92 are again brought into intermeshing engagement.

" lAn adjustable stop means is also provided for limiting rapid forward movement of the saddle 25 and head 30 under operation of the hand lever 18. After the rapid forward travel of the saddle has been arrested, this stop means is readily releasable to permit ne adjustment of the saddle and head by the screw 95 and hand wheels 84 and 85. The means for readily releasing the stop means also provides for rendering the stop inoperative ammiro Jvlcenitis desired to permit full `traveliof Ythe sadfdle under operationfof theilever F18.

Referringwto Figs. Y1, v6 fand 8., a plate |123 is rattachedfto the side flange .21 of theisaddle aand isfprovided with a T-shapedfslot-flllwvithinwhich e, bolt, :comprising va head |35 and -an -.outwardly extending stem portion =|^26.,.is slidably mounted. 'This bolt carries a plate member |-2'1 provided Vwith an outwardly extending stop arm -|281andis adapted to be clamped in .fany :desired adjusted .position` along ,the-lengthof'themlate' I 23ibyfmeans 1offiamut|23.

A hollow 1sleeve member n|313 `is :rotatably mounted within the side wall -lll Aof the bed rplate 13 and within a .portion 15| lo'f 'theirame fl. A .rod |23! extends'through the-:bore ofthe sleeve and is rotatably mounted therein by vmeans fof fbearings |32'and |33. An operating iknob y|34 siattached to the outerendfofthe :rod |3:|,;a11`d a fcollar |35 provides for maintaining the 4:ro-d |f3| 'against axial movement wvithin the 'sleeve :|30. The rod i|3| extends rearwardly beyond the collar |35 and is providedwith a:screw-threaded.por- 'tion :|36 which has threadediengagement witha .member :|31 .positioned within'thehollow 'boreio'f 'the sleeve l|30 at the rearward end thereof.` The .member 'l 31 is slidably ybut non-rotatably mounted -Within the bore of the sleeve |30'by means of a .suitable key attached .to the vsleeve Y|311 'and foperating within an elongated keyway 1.38.provided in thesmember |31.

The 'member 13:7 :carries fa finger |39 which vnormallyextends upwardly `andern-.Tages the stop arm |28 Lon the saddle 25 to limit forward Vmovement `of the saddle under action Vof the lever 18.

The :position at which the saddleis `stopped ldur- .ing its rapid forward movement is Vreadily `ad- J'usted within limits by turning the knob |34 to effect forwarder rearwardmovementof the member |31iand the nger |39. Furtheradjustmentis -iaccomplished by varying the position of the stop arm |28 inthe plate |23,-as hereinabove described. A collar |40 attached to thesleeve |30 by aset screw or the like :provides for limiting axialmovementof the sleeve |30.

As above described, the sleeve 13D' .is `rotatably mountedin the wall i4 and frame-portion l I, and rotation of this sleeve is utilized to move thestop nger '|39 into 'and out of a released or inoperative .position with respect to the stop ringer |28. Rotation of the sleeve |30 is eiected by a collar VHl 4which is Vattached -to the Asleeve 130, as by means of the set screw M2, and .is ,provided with `anoperating handle |43. Thus Vupon rotation'of the collar |-4l by the handle |43 in a 'counterclockwise direction, as viewed in Figfr, the sleeve |302is caused to rotate to -move the 1n-gerv|3 9 to a lower position out of operative relationship with the finger |28. Moving the handle IN43 in theop- .posite direction returns the linger |39 intooperative position with respect to the linger "|28, vThe stop means is thus readily renderedinoperative either to release the stops to .provide 'for slow speed adjustment after the rapid forward travel ofthe saddle 25 and head 3D has been arrested, or to permit lrapid movement of the 'saddle throughout its path of movement.

Each 'of the hand wheels 59,6lly84 and 85 has ya scale-and an index marker associated therewith.

As best shown -in Fig. 3dye. scale M4 is marked-on the periphery of the several hand wheels and *the index marker `|45 -is carried by an adjustable `'finger |46. Each of -theiingers iN/Gis general-1v the Lsame lin :construction and comprises fa collar llllrctatably mounted 1onfa sleeve portion fof the bearing .supporting the several hand wheels. member H8 [extends radially/outwardly fromfthe |collar ih" fand :carries thefnger 446 having the index4 marked thereon. The indexngersm lare thus rotatablymountedcn ilxed-bearings and are adapted to be locked in adjusted :position .thereon vby -set screws M9 .having :an operating `.knob |50 attachedd to the outer ends vetheveot. Thefset screws |43, while shown fgenerallyias eltending through the members |148,.may:be .-posi- .tioned in any desired rportion ofthe fcollars M1.

:A grinding machine Lis thus provided which :is universal in 7operation 'and provides for reflecting any vdesired grinding Ioperation 4upon work ma- 2teria1oarried-by the work holder 13 and the freciprocal worktable Hi. The head .-30 and shaft 'Irl are adapted -to :receive Vanyfdesired typeof .grinding whee'lsthereon :and arelreadilyadjustedas to both vertical and -axia'l .position :by Ameans lof fthe `'hand wheels :59 and .60 and .the .pluralityof -con- Vcentric nylindricalmembers `31|, `35 and 31.

:Suitable means .such .as fa. hand wheel2l aerovides :for re'ciprocally .moving the work table M v.and vwork holder :t9 along the bed plate M3, and feeding movement -of vthe saddle 25 and head 40 4`towards and away from the -work tabledris :rapid- -ly-and simply effected bythe fhand lever 18. iSlow 4and Aaccurate .adjusting :movement lof the saddle V25 and head .30 transversely `'of the worktable 't6 is ,effected by means of the -co-operatingisorew .members 96 vand 91. A simple means comprising the .knob '|64 provides .for 'disconnecting the'slow feed mechanism fromthe saddle I25 and :head 30 when it is desired to nperate these ylattermcrnizuers fat -a rapid speed by means' of the handle 18.

fOperation of fthe vertically adjusting vmeans for 'the head v3i'l,the means for rapidlymoving'the saddle 25 and .head30 towardandawayrfmm the workfrnateria-l ron the table |'6,-an-d the means for 'effecting slow adjusting movemenil Vof the :sadrlle :and head, can Vbe eiected from veither side and end of `th'efiriachine atftheconvenience of the-operator. The :means for effecting' slow feeding movement =of 'the head 30 from therear :side mf D the mrachlnemay rbereardily disconnected when it is 4desired to foperate such .feeding means `solely .from the .frontend of the machine. The ren'tite drive means for the head 30 and shaft 3| is carried `by the :Inova-ble saddlelf25 :and iprovidesnasmbove described, for lboth vertical :and :rotational Ladjustin'g movement of the Ahead -30 with :respect to the "saddle 25.

Anadjustable :stop .means is .provided forlimlt- .ing the `forward travel -of the saddle irand head 3D under operation of the lever `7-81 Ulln'sstop means is y'simply and readily :released :or :rendered inoperative by `ra-handle :member M3 to permit slow speed :adjustment lof fthe saddle 5 and head 43l? :after lrapid movement thereof has been arrested, or to permit .full travel 'o'f 'the i saddle speed under :operation oi 'fthe lever 51B.

tUnangfes may-be :made Ain the form, construc tion :and arrangement of the parts without idesedili-ing from'tbe spirit of the 1invention "or sacri- Ali'cing any'o'f its-advantages-and the rightis hereby reserved to makeali such 'changes as fairly fall within `the scope ofthe following claims.

The invention ishereby claimed asV follows:

1. 3A machine 'tool othe .character described 'comprising a Trame, 'a table for supporting work material mounted on 'said frame, a supporting member s'lidalblym'ounted onsaid frame formovelment transversely ofV said -work Asupportim;table, a tool 'support mounted 'onsaid supporting member for movement therewith, a shaft extending longitudinally of the frame adjacent its forward side, a sprocket mounted on said shaft, aV second sprocket mounted on the frame adjacent a rear portion thereof, a chain interconnecting said sprockets, means connecting said chain to said Asupporting member to eifect rapid movement of the member upon movement of the chain, means on said shaft at one end of the frame and means attached to said second sprocket at the opposite end of the frame for detachably receiving an operating lever, said lever providing for rotating said sprockets to effect rapid movement of said chain, screw means operatively connected with the supporting member for effecting slow movement of said supporting member and tool support, and means for selectively rendering said screw means .operative or inoperative.

f- 2. A machine tool i the character described comprising a frame, a table for supporting work material mounted on said frame, a supporting member slidably mounted on said frame for movement transversely of said work supporting table, a tool support mounted on said supporting member for movement therewith, means for imparting rapid transverse movement to said supporting member rapidly to feed the tool support towards and away from work material on said table, means for imparting slow feeding movement to said supporting member finely to adjust the tool support with respect to work material, means for selectively rendering said last named means operative or inoperative, stop means for limiting rapid forward movement of said supporting member and tool support, and selective means for rendering said stop means inoperative to limit forward movement of the supporting member and tool support.

3. A machine tool of the character described comprising a frame, a table for supporting work material mounted on said frame, a supporting member slidably mounted on said frame'for movement transversely of said work supporting tab-le, a tool support mounted on said supporting member for movement therewith, means for imparting rapid transverse movement to said supporting member rapidly to feed the tool support towards and away from work material on said table, means for imparting slow feeding movement to said supporting member finely to adjust the tool support with respect to work material, means for selectively rendering said last named means operative or inoperative, a pair of cooperating stop members carried by the frame and the supporting member respectively and providing for limiting rapid forward movement of said supporting member and tool support, means for adjusting the position of at least one of said stop members along the path of movement of said supporting member and tool support, andy selective means for moving one of said stop members to an inoperative position with respect to the other stop member.

4. A machine `tool of the character described comprising a frame, a table for supporting work material mounted on said frame, a supporting member slidably mounted. on said frame for movement transversely of said work supporting table, a tool support mounted on said supporting member for movement therewith, means for imparting rapid transverse movement to said supporting member rapidly to feed the tool support towards and away from work material on said table, means for imparting slow feedingmovement to said supporting member finely'V to adjust the tool support with respect-to workmaterial, means for selectively renderingsaid lastV named means 0D- erative or inoperative, a stop member adjustably carried by said supporting member, a cooperating stop member adjustably carried by said frame to provide for limiting rapid forward movement of the supporting member and tool support, and means for rotatingk fone of said stop members to a released inoperative vposition with respect to the other stop member.

5. A machine tool o f the character described comprising av frame, [a table for supporting work material mounted on said frame, a supporting member slidably mounted on4 said frame for movement transversely of said workA supporting table, a tool support mounted ,on said supporting member for movement therewith, means for imparting rapid transverse movement to said supporting member rapidly tofeed' the tool support towards and away from work materialen said table, means for imparting slow feeding movement to said supporting member finely to adjust the tool support with respect to work material, means for selectively rendering said last named means operative or inoperative, a stop member carried by said supporting member, a cooperating stop member carried by said frame to provide for limiting rapid forward movement ofthe supporting member and tool support, meansoperable from one side of said frame for rotating said stop member carried bythe frame Vto va releasedinoperative position with`respect to said other stop member, and means cooperating Vwith saidlast named means and operable from said side of the frame for adjusting the position of said stop member carried by the framealong the pathof movement of said supporting member and tool support.

6. In a machine of the character described, a work supporta head mounted for movement towards and away from said work support, means for effecting said` movement of said headpand means for selectively limiting forward travel of said head comprising a rotatively mounted hollow sleeve, a stop member slidably mountedin ,said sleeve, a splined connectionbetween saidstop member and said sleeve, means extending through the hollow bore` ofsaid Asleeve for adjusting the position of said stop member, andmeans for rotating said sleeve to move said stop member to a released inoperative position.

7. In a machine of the character described, a work support, a head mounted for movement towards and away from Vsaid work support,.means for effectingl said movement of said head, and means for selectively limiting forward travel of said head comprising a rotatively mounted hollow sleeve, a stop member slidably mounted in said sleeve, a splined connection between said stop member and said sleeve, a shaft rotatably mounted within-the hollow bore of said sleeve, a screw threaded connection between said shaft and said stop member to adjust the positionV of thestop member upon rotation of said shaft, means for rotating said shaft, and means for rotatingsaid sleeve to move said stop member to a released inoperative position. i

8. 1n a machine ofthe character described, a work support, a head mounted for movement towards and away'from saidwork support, and means operatively connectedwith the head for effecting movement ofsaid head comprising a rotatable sleeve, a screw threaded sleeve slidably mounted on said rst named sleeve, means pro- Y viding a splined connection between said'frst and econd sleeves, V4and means for selectively 13 said shaft, and means for rotating said sleeve to move said stop member to a released inoperative position.

19. In a machine tool having a reciprocable carriage, a transmission for moving said carriage comprising a rotatable sleeve, a screw threaded sleeve slidably mounted on said first named sleeve, means providing a splined connection between said first and second sleeves, and means for selectively locking together and unlocking said first and second named sleeves.

20. In a machine tool having a reciprocable carriage, a transmission for moving said carriage comprising a rotatable sleeve, a screw threaded sleeve slidably mounted upon said first mentioned sleeve, means providing a splined connection between said rst and second sleeves7 means for selectively locking together and unlocking said rst and second sleeves, and a nut flxedly connected to said reciprocable carriage and having a screw threaded engagement with said second sleeve.

21. In a machine tool having a reciprocable carriage, a transmission for moving said carriage comprising a rotatable sleeve, handle means for rotating said sleeve, a screw threaded sleeve slidably mounted on said first sleeve, means providing a splined connection between said rst and second sleeves, a cam member for selectively7 locking together and unlocking said rst and second sleeves, a shaft rotatably mounted in a hollow bore of said rst sleeve and having operative connection with said cam member, and means for selectively rotating said shaft to effect locking and unlocking of said sleeves by said cam member.

22. In a machine tool having a reciprocable carriage, means for effecting movement of said carriage comprising a rotatable sleeve, handle means for rotating said sleeve, a screw threaded sleeve slidably mounted on said rst named sleeve,

means providing a splined connection between said rst and second sleeves, the inner end of said rst sleeve being notched to provide a plurality of resilient fingers, a wedge shaped cam member engageable with said resilient fingers and providing for locking together and unlocking said rst and second named sleeves, a shaft rotatably mounted in the hollow bore of vsaid first named sleeve and having operative screw threaded engagement with said cam member to cause locking and unlocking movement of the cam member, and means for selectively rotating said shaft to effect locking and unlocking of said sleeves by said cam member.

23. In a machine tool having a reciprocable carriage, a transmission for moving said carriage comprising a rotatable sleeve, a screw threaded sleeve slidably mounted on said rst named sleeve,

means providing a splined connection between said first and second sleeves, means for selectively locking together and unlocking said first and second named sleeves, a hand wheel attached to said first sleeve at one side of the machine and providing for rotating said sleeve, a second hand wheel positioned at the opposite side of the machine, a gear attached to said rst sleeve for also effecting rotation of the sleeve, a shaft eX- tending transversely of the machine and having a splined connection with said second hand wheel, a gear attached to said shaft and adapted to mesh with said first named gear to cause rotation of the first named sleeve upon rotation of the shaft by said second hand wheel, and means for effecting axial movement of said shaft selectively to cause meshing engagement of said gears or disengagement thereof.

24. In a machine tool having a reciprocable carriage, a rapid traverse transmission operatively connected to said carriage, said transmission comprising a turnable driving member and a flexible transmission member drivingly engaging said driving member and connected to said carriage, an independent slow feed transmission operatively connected to said carriage, and means for disconnecting the slow feed transmission from the carriage to permit movement of said carriage by said rapid traverse transmission.

25. In a machine tool having a reciprocable carriage, a rapid traverse transmission, operatively connected with said carriage and comprising a sprocket and chain drive, an independent slow feed transmission operatively connected with said carriage and comprising a screw' and nut drive, and means for disconnecting said slow feed transmission from said reciprocable carriage to permit movement of said carriage by said rapid traverse transmission.

GUSTAF ERIKSON. EDDIE CHRISTIAN EILSTRUP.

REFERENCES CITED yThe following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 2,190,134 Garside et al. Feb. 13, 1940 1,584,339 Wernecke May 11, 1926 2,116,794 La Fleur May 10, 1938 1,788,475 Van Norman J an, 13, 1941 1,881,984 Van Norman Oct. 11, 1932 2,101,787 Amidon Dec. 7, 1937 2,239,639 Amidon Apr. 22, 1941 725,085 Jacob Apr. 14, 1903 1,850,392 I-Iaas Mar. 22, 1932 

